Apparatus for detecting radioactivity of internal parts and external parts of whole body

Abstract

A method and apparatus for detecting radioactivity of a whole body is disclosed. The apparatus for detecting radioactivity of a whole body is divided into upper and lower parts, the upper and lower parts are divided into front, rear, left and right portions, respectively, a radioactivity detection unit is installed at each of the front, rear, left and right portions, radioactivity values detected by each of the radioactivity detection units are compared and analyzed such that radioactivity values detected by the radioactivity detection units positioned at upper front and rear parts are compared, radioactivity values detected by the radioactivity detection units positioned at upper left and right parts are compared, and also radioactivity values detected by the lower radioactivity detection units are compared in the same manner, thus determining whether or not the internal parts or external parts of the body of a detection target have been contaminated by radioactivity.

What is claimed is: 
     
       1. A method for detecting a radioactivity contamination of internal parts and external parts of a whole body, the method comprising:
 receiving a whole body within a radioactivity whole body detection apparatus via an entrance or a door installed at one side of the radioactivity whole body detection apparatus; 
 measuring radioactivity values of the whole body by radioactivity detection units installed on the front, rear, left, and right portions of the radioactivity whole body detection apparatus, wherein the radioactivity detection units are fixedly installed to be long in a vertical direction on the front, rear, left, and right portions of upper and lower parts of the radioactivity whole body detection apparatus as upper detection units and lower detection units, respectively; and 
 determining whether or not a detection target of the whole body has been contaminated by radioactivity based on the radioactivity values detected by the detection units, wherein the upper detection units compare radioactivity values detected from the front and rear portions and compare radioactivity values detected from the left and right portions, and the lower detection units compare radioactivity values detected from the front and rear portions and compare radioactivity values detected from the left and right portions in the same manner to thereby determine whether or not the internal parts or external parts of the body have been contaminated by radioactivity. 
 
     
     
       2. The method of  claim 1 , wherein when the radioactivity detection units compare the radioactivity values detected from the front, rear, left, and right portions of the upper and lower parts, a rate obtained by dividing a larger value among the detected radioactivity values by a smaller value is set between 1.8 and 2.2 as the reference for determining whether or not the internal parts or external parts of the body have been contaminated by radioactivity, and when a detected radioactivity value is higher than the set value, it is determined that the external parts of the body have been contaminated by radioactivity, and when a detected radioactivity value is lower than the set value, it is determined that the internal parts of the body have been contaminated by radioactivity. 
     
     
       3. The method of  claim 2 , further comprising, when it is determined that the internal parts of the body have been contaminated by radioactivity, adding radioactivity values detected from the front, rear, left and right portions, which mutually correspond to each other, of the upper and lower parts of the radioactivity detection units; and obtaining a radioactivity value by averaging the added value. 
     
     
       4. The method of  claim 2 , further comprising inputting bodily conditions of the chest size, waist measurement, and hip size of the radioactivity detection target, and when the difference between two values based on radioactivity values detected simultaneously or separately by detection units installed at the front, rear, left, and right portions of upper and lower parts is determined to be a value generated by the difference in distances of the inputted bodily conditions, it is determined that the external parts of the body have been contaminated by radioactivity. 
     
     
       5. The method of  claim 1 , further comprising interrupting an introduction of gamma rays to shield the external parts of the radioactivity detection units to thereby shield nearby natural radial rays to prevent gamma rays from being introduced into the radioactivity whole body detection apparatus from the exterior.